package so.n_3.musicbox.servlet;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author oasynnoum
 */
@WebServlet(name = "ListDirectory", urlPatterns = {"/ls"})
public class ListDirectory extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/xml;charset=UTF-8");
        String targetDirectoryPath = request.getParameter("targetDirectory");
        File targetDirectory = new File(targetDirectoryPath);
        File[] children = targetDirectory.listFiles(new FileFilter() {
            @Override
            public boolean accept(File file) {
                return file.isDirectory();
            }
        });
        boolean result = children != null;
        PrintWriter out = response.getWriter();
        try {
            String parentDirectory = targetDirectory.getParent() == null ? "/" : targetDirectory.getParent();
            out.println("<?xml version='1.0' encoding='UTF-8'?>");
            out.println("<result value='" + Boolean.toString(result) + "'>");
            out.println("<currentDirectory path='" + targetDirectory.getAbsolutePath() + "' />");
            out.println("<parentDirectory path='" + parentDirectory + "' />");
            out.println("<children>");
            if (result) {
                for (int i = 0; i < children.length; i++) {
                    out.println("<directory path='" + children[i].getAbsolutePath() + "' />");
                }
            }
            out.println("</children>");
            out.println("</result>");
        } catch (Exception e) {
            out.println(e.getMessage());
            e.printStackTrace(out);
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
